| Scientific Name | Notes | Rarity Ranks | Common Name |
|---|---|---|---|
| Agoseris heterophylla var. heterophylla | CNPS-EB: C | ||
| Agoseris heterophylla var. unknown | Agoseris heterophylla split into 2 vars. in 2011 Jepson Manual, need field work to resolve vars. | CNPS-EB: B? | annual agoseris |
| Alopecurus saccatus | CNPS-EB: B | Howell's meadow foxtail | |
| Amaranthus powellii | CNPS-EB: A1 | Powell's amaranth | |
| Aphyllon purpureum | CNPS-EB: C | naked broomrape | |
| Arctostaphylos auriculata | CNPS-EB: *A2 State CNPS: 1B.3 Global Rank: G2 CNDDB Rank: S2 | Mount Diablo manzanita | |
| Arctostaphylos manzanita subsp. laevigata | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G5T2 CNDDB Rank: S2 | Contra Costa manzanita | |
| Atriplex argentea var. expansa | CNPS-EB: B | silverscale | |
| Atriplex coronata var. coronata | CNPS-EB: *A2 State CNPS: 4.2 Global Rank: G4T3 CNDDB Rank: S3 | crownscale | |
| Atriplex depressa | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G2 CNDDB Rank: S2 | brittlescale | |
| Atriplex fruticulosa | CNPS-EB: B | ballscale, little oak orach, ball saltbush | |
| Blennosperma nanum var. nanum | CNPS-EB: C | blennosperma | |
| Blepharizonia plumosa | CNPS-EB: *A2 State CNPS: 1B.1 Global Rank: G1G2 CNDDB Rank: S1S2 | big tarplant | |
| Brodiaea terrestris subsp. terrestris | CNPS-EB: B | dwarf brodiaea | |
| California macrophylla | (formerly Erodium macrophyllum | CNPS-EB: B | round-leaved filaree |
| Calochortus pulchellus | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G2 CNDDB Rank: S2 | Mount Diablo fairy-lantern | |
| Calycadenia multiglandulosa | CNPS-EB: A2 | sticky calycadenia | |
| Claytonia exigua subsp. exigua | CNPS-EB: C | common montia | |
| Convolvulus simulans | CNPS-EB: *A2 State CNPS: 4.2 Global Rank: G4 CNDDB Rank: S4 | small-flowered morning-glory | |
| Downingia insignis | CNPS-EB: A1 | cupped downingia | |
| Erythranthe nasuta | CNPS-EB: A2 | shy monkeyflower | |
| Euphorbia ocellata subsp. ocellata | CNPS-EB: B | valley spurge | |
| Extriplex joaquinana | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G2 CNDDB Rank: S2 | San Joaquin spearscale, San Joaquin saltbush | |
| Gilia tricolor subsp. diffusa | CNPS-EB: B | birds-eye gilia | |
| Gilia tricolor subsp. tricolor | CNPS-EB: C | birds-eye gilia | |
| Hemizonia congesta subsp. lutescens | CNPS-EB: B | hayfield tarweed | |
| Hesperevax caulescens | (H. sparsiflora is more common | CNPS-EB: *A2 State CNPS: 4.2 Global Rank: G3 CNDDB Rank: S3 | hogwallow starfish |
| Hesperolinon breweri | CNPS-EB: *A2 State CNPS: 1B.2 Global Rank: G2 CNDDB Rank: S2 | Brewer's western flax | |
| Holocarpha obconica | CNPS-EB: B | San Joaquin tarplant | |
| Hydrocotyle verticillata | CNPS-EB: B | whorled marsh pennywort | |
| Juncus mexicanus | CNPS-EB: C | Mexican rush | |
| Lepidium acutidens | CNPS-EB: C | sharp-toothed pepper-grass | |
| Lepidium latipes | CNPS-EB: B | dwarf peppergrass | |
| Lithophragma parviflorum var. parviflorum | CNPS-EB: B | prairie star | |
| Lupinus pachylobus | CNPS-EB: B | big pod lupine | |
| Malacothamnus fremontii | CNPS-EB: C | white-coat mallow | |
| Microseris sylvatica | CNPS-EB: *A2 State CNPS: 4.2 Global Rank: G4 CNDDB Rank: S4 | sylvan microseris | |
| Montia fontana | CNPS-EB: C | water chickweed, blinks, water chickweed | |
| Myosurus minimus subsp. minimus | CNPS-EB: C | common mouse-tail | |
| Myosurus sessilis | CNPS-EB: A1 | sessile mouse-tail | |
| Navarretia cotulifolia | CNPS-EB: *A2 State CNPS: 4.2 Global Rank: G4 CNDDB Rank: S4 | cotula navarretia | |
| Navarretia heterandra | CNPS-EB: *A1 State CNPS: 4.3 Global Rank: G4 CNDDB Rank: S4 | Tehama navarretia | |
| Navarretia nigelliformis subsp. radians | CNPS-EB: *A1 State CNPS: 1B.2 Global Rank: G4T2 CNDDB Rank: S2 | shining navarretia | |
| Navarretia viscidula | CNPS-EB: A2 | sticky navarretia | |
| Pectocarya penicillata | CNPS-EB: A2 | northern pectocarya, winged pectocarya | |
| Plagiobothrys acanthocarpus | CNPS-EB: B | adobe popcornflower, adobe allocarya | |
| Plagiobothrys humistratus | CNPS-EB: A2 | low popcornflower, dwarf allocarya | |
| Plagiobothrys stipitatus var. stipitatus | (var. micranthus is more commo | CNPS-EB: C | showy great valley popcornflower, stipitate allocarya |
| Plagiobothrys trachycarpus | CNPS-EB: C | rough-nutlet popcornflower, rough-fruited allocarya | |
| Plantago elongata | CNPS-EB: B | annual coast plantain | |
| Pogogyne zizyphoroides | CNPS-EB: A2 | Sacramento beardstyle | |
| Psilocarphus oregonus | CNPS-EB: A2 | Oregon woollyheads, Oregon woolly-marbles | |
| Quercus berberidifolia | CNPS-EB: C | scrub oak | |
| Quercus lobata | CNPS-EB: B | valley oak, roble | |
| Ranunculus canus var. canus | CNPS-EB: C | Sacramento Valley buttercup | |
| Salix gooddingii | CNPS-EB: B | Goodding's black willow | |
| Stellaria nitens | CNPS-EB: C | shining chickweed | |
| Stipa pulchra | CNPS-EB: C | purple needlegrass | |
| Trifolium fucatum | CNPS-EB: C | bull clover | |
| Tropidocarpum gracile | CNPS-EB: B | slender tropidocarpum | |
| Allenrolfea occidentalis | CNPS-EB: C | iodine bush | |
| Amsinckia grandiflora | CNPS-EB: *A1 State CNPS: 1B.1 Global Rank: G1 CNDDB Rank: S1 FESA Status: FE CESA Status: CE | large-flowered fiddleneck | |
| Amsinckia lycopsoides | CNPS-EB: C | bugloss-flowered fiddleneck, bugloss fiddleneck | |
| Ancistrocarphus filagineus | CNPS-EB: C | woolly fishhooks | |
| Anemopsis californica | CNPS-EB: B | yerba mansa, lizard tail | |
| Aphyllon vallicola | CNPS-EB: B | California broom-rape | |
| Arctostaphylos manzanita subsp. manzanita | CNPS-EB: A2 | common manzanita | |
| Astragalus asymmetricus | CNPS-EB: C | San Joaquin locoweeed | |
| Bidens frondosa | CNPS-EB: B | sticktight | |
| Blepharizonia laxa | (formerly B. plumosa ssp. visc | CNPS-EB: B | big tarplant |
| Bolboschoenus maritimus subsp. paludosus | (formerly Scirpus m.) | CNPS-EB: C | bulrush |
| Calystegia sepium subsp. limnophila | CNPS-EB: B | hedge bindweed | |
| Camissonia campestris subsp. campestris | (historical-1940) | CNPS-EB: A1x | Mojave suncup |
| Castilleja rubicundula subsp. lithospermoides | CNPS-EB: B | cream sacs | |
| Caulanthus flavescens | CNPS-EB: A2 | yellow-flowered thelypodium | |
| Cicendia quadrangularis | CNPS-EB: A2 | timwort | |
| Clarkia breweri | CNPS-EB: *A1 State CNPS: 4.2 Global Rank: G4 CNDDB Rank: S4 | Brewer's clarkia | |
| Collinsia sparsiflora var. sparsiflora | CNPS-EB: C | few-flowered blue-eyed Mary | |
| Cryptantha microstachys | CNPS-EB: A2 | Tejon cryptantha | |
| Deinandra kelloggii | (formerly Hemizonia k.) | CNPS-EB: A2 | Kellogg's tarweed |
| Delphinium hansenii subsp. hansenii | CNPS-EB: A2 | Hansen's larkspur | |
| Delphinium hesperium subsp. hesperium | CNPS-EB: B | western larkspur | |
| Delphinium variegatum subsp. variegatum | CNPS-EB: C | royal larkspur | |
| Deschampsia cespitosa subsp. cespitosa | CNPS-EB: C | tufted hairgrass | |
| Descurainia pinnata subsp. brachycarpa | CNPS-EB: A1x | tansy mustard | |
| Downingia ornatissima var. mirabilis | (historical-1956; formerly D. ornatissima var. eximia) | CNPS-EB: A1x | Solano downingia |
| Downingia pulchella | CNPS-EB: B | flat-faced downingia | |
| Epilobium cleistogamum | CNPS-EB: A1 | cleistogamous boisduvalia | |
| Eriastrum pluriflorum subsp. pluriflorum | CNPS-EB: A1 | many-flowered eriastrum | |
| Erigeron philadelphicus var. philadelphicus | CNPS-EB: C | fleabane | |
| Eriogonum angulosum | CNPS-EB: B | angle-stem wild buckwheat, angle-stemmed eriogonum | |
| Eriogonum luteolum var. luteolum | CNPS-EB: A2 | golden-carpet wild buckwheat, golden carpet | |
| Eriogonum nudum var. pubiflorum | CNPS-EB: A1x | Fremont's wild buckwheat, naked-stemmed buckwheat | |
| Eriogonum truncatum | CNPS-EB: *A1 State CNPS: 1B.1 Global Rank: G1 CNDDB Rank: S1 | Mount Diablo buckwheat | |
| Eriophyllum lanatum var. achilleoides | CNPS-EB: C | woolly sunflower | |
| Eryngium vaseyi var. vallicola | CNPS-EB: A1 | coyote-thistle, Vasey's coyote-thistle | |
| Erythranthe latidens | (formerly Mimulus latidens) | CNPS-EB: A1 | broad-toothed monkeyflower |
| Eschscholzia caespitosa | CNPS-EB: A1 | tufted poppy | |
| Frangula californica subsp. tomentella | (formerly Rhamnus t.) | CNPS-EB: C | hoary coffeeberry |
| Fritillaria agrestis | CNPS-EB: *A2 State CNPS: 4.2 Global Rank: G3 CNDDB Rank: S3 | stinkbells | |
| Galium andrewsii subsp. gatense | CNPS-EB: *A2 State CNPS: 4.2 Global Rank: G5T3 CNDDB Rank: S3 | phlox-leaf serpentine bedstraw, serpentine bedstraw | |
| Gilia capitata subsp. staminea | CNPS-EB: C | blue field gilia | |
| Githopsis diffusa subsp. robusta | CNPS-EB: A2 | southern bluecup | |
| Githopsis specularioides | CNPS-EB: B | common bluecup | |
| Gruvelia pusilla | (formerly Pectocarya pusilla) | CNPS-EB: B | little pectocarya |
| Gutierrezia californica | CNPS-EB: C | California matchweed | |
| Hesperevax acaulis var. ambusticola | (H. sparsiflora is more common | CNPS-EB: A1x | fire evax |
| Lasthenia minor | CNPS-EB: A1 | coastal goldfields, woolly goldfields | |
| Layia hieracioides | CNPS-EB: C | tall layia | |
| Lepidium oxycarpum | CNPS-EB: A2 | sharp-podded pepper-grass | |
| Leptosiphon androsaceus | (formerly Linanthus a.) | CNPS-EB: C | common linanthus, common leptosiphon |
| Leptosiphon ciliatus | (formerly Linanthus c.) | CNPS-EB: C | whisker brush |
| Leptosiphon parviflorus | (formerly Linanthus p.) | CNPS-EB: B | small-flowered linanthus, small-flowered leptosiphon |
| Lessingia pectinata var. tenuipes | CNPS-EB: A2 | valley lessingia | |
| Lithophragma bolanderi | CNPS-EB: A1 | Bolander starflower | |
| Madia radiata | (historical-1941) | CNPS-EB: *A1x State CNPS: 1B.1 Global Rank: G3 CNDDB Rank: S3 | showy golden madia, showy madia |
| Malacothrix floccifera | CNPS-EB: C | woolly malacothrix | |
| Microseris acuminata | CNPS-EB: A1 | Sierra Foothills microseris | |
| Microseris campestris | CNPS-EB: A1 | San Joaquin microseris | |
| Microseris douglasii subsp. tenella | (subsp douglasii is more common) | CNPS-EB: A2 | silver puffs |
| Microseris elegans | CNPS-EB: A1 | elegant microseris | |
| Monolopia major | CNPS-EB: B | cupped monolopia | |
| Navarretia atractyloides | CNPS-EB: A2 | holly-leaved navarretia | |
| Navarretia hamata subsp. parviloba | CNPS-EB: A1 | hooked navarretia | |
| Navarretia nigelliformis subsp. nigelliformis | CNPS-EB: *A2? State CNPS: 4.2 Global Rank: G4T3 CNDDB Rank: S3 | adobe navarretia | |
| Navarretia pubescens | CNPS-EB: C | downy navarretia | |
| Nuttallanthus texanus | CNPS-EB: A2 | blue toadflax | |
| Oenothera elata subsp. hookeri | CNPS-EB: B | evening-primrose | |
| Packera breweri | (formerly Senecio b.) | CNPS-EB: C | Brewer's ragwort, Brewer's butterweed |
| Penstemon heterophyllus var. purdyi | CNPS-EB: A2 | foothill penstemon | |
| Pentachaeta alsinoides | CNPS-EB: C | tiny pentachaeta | |
| Pentachaeta exilis subsp. exilis | CNPS-EB: A1 | meager pentachaeta | |
| Phacelia ciliata | CNPS-EB: B | Great Valley phacelia, Great Valley phacelia | |
| Phacelia tanacetifolia | CNPS-EB: B | tansy phacelia | |
| Pilularia americana | CNPS-EB: A1 | pillwort | |
| Plagiobothrys fulvus var. campestris | CNPS-EB: B | field popcornflower, fulvous popcornflower | |
| Plagiobothrys infectivus | CNPS-EB: A1x | dye popcornflower | |
| Poa howellii | CNPS-EB: A2 | Howell's bluegrass | |
| Psilocarphus brevissimus var. brevissimus | CNPS-EB: B | dwarf woollyheads, dwarf woolly-marbles | |
| Rhamnus crocea | CNPS-EB: C | spiny redberry | |
| Rhus aromatica | (formerly R. trilobata) | CNPS-EB: B | skunk bush, skunkbrush, squawbush |
| Sagina decumbens subsp. occidentalis | (S. apetala is more common) | CNPS-EB: B | western pearlwort |
| Salvia carduacea | (historical-1946) | CNPS-EB: A1x | thistle sage |
| Stebbinsoseris heterocarpa | CNPS-EB: C | grassland silverpuffs, derived microseris | |
| Stylocline gnaphaloides | CNPS-EB: B | everlasting neststraw, nest-straw | |
| Thysanocarpus laciniatus | CNPS-EB: B | lacepod | |
| Trifolium depauperatum var. depauperatum | (vars. amplectens and truncatu | CNPS-EB: B | dwarf sack clover |
| Trifolium dichotomum | CNPS-EB: C | branched indian clover | |
| Trifolium gambelii | (Included within T. fucatum in | CNPS-EB: A1 | bull clover |
| Trifolium obtusiflorum | CNPS-EB: B | clammy clover, creek clover | |
| Trifolium olivaceum | CNPS-EB: C | olive clover | |
| Triglochin scilloides | CNPS-EB: C | flowering-quillwort |